|Publication number||US7254605 B1|
|Application number||US 09/695,932|
|Publication date||Aug 7, 2007|
|Filing date||Oct 26, 2000|
|Priority date||Oct 26, 2000|
|Also published as||US7806273, US7809788, US20070260680, US20070266086|
|Publication number||09695932, 695932, US 7254605 B1, US 7254605B1, US-B1-7254605, US7254605 B1, US7254605B1|
|Inventors||William E. Strum|
|Original Assignee||Austen Services Llc|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (34), Non-Patent Citations (24), Referenced by (78), Classifications (15), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The following United States utility patent applications have a common assignee and contain some common disclosure:
1. Field of the Invention
The present invention relates generally to internetworking. More specifically, the present invention pertains to controlling multimedia communications over data networks.
2. Related Art
Global computer networks, such as the Internet, provide a myriad of opportunities for the opinion research industry. Opinion gathering tools, such as dial polls and surveys, can be developed to reach millions of individuals to extract their positions and predispositions toward a variety of topics and issues. Online polls and surveys enable respondents to furnish input and view the reactions of other respondents instantly. An example of an opinion research system that provides real time opinion gathering is described in the '624 application. The opinion research system of the '624 application enables a plurality of online respondents to view an event and participate in an opinion poll. The respondents receive real time feedback on their client displays that indicate each respondent's opinion value as well as the composite opinion value for the entire panel.
A challenge to Internet-based opinion research systems is the ability to effectively manage online sessions having very large panel sizes while maintaining continuous data interchanges between the server and clients and supplying the most current and accurate opinion values. Although the standard Internet Protocol (IP) (defined in Internet Standard (STD) 5, Request for Comments (RFC) 791 (Internet Architecture Board)), has been developed to govern communications over public and private Internet backbones, the protocol does not guarantee quality of service (QoS). Bandwidth availability, latency, and data loss can impede the effectiveness of opinion gathering and substantially hinder a respondent's ability to receive and comprehend the data in a real time environment.
Typically, IP networks lack sufficient infrastructure to permit a computer application to reserve the requisite bandwidth to communicate over a computer network. The amount of available bandwidth depends on numerous factors, such as the time of day and locality of the client or server. The packet size for the data that is being transmitted is another limiting factor. A significant amount of efficiency can be lost due to packet overhead that contains substantial header information. If the client or server is not able to reserve sufficient bandwidth, client-server communications can suffer from substantial data delay or loss. Therefore, an opinion research server's ability to effectively interact with a respondent's computer and provide real time updates can be adversely affected by bandwidth availability.
As intimated, packet overhead manifests larger bandwidth requirements. One possible solution to reducing packet overhead is to buffer and aggregate the frames into a single data packet (e.g., IP datagram or protocol data unit (PDU)). However, buffering the frames can also produce data delay or latency. Generally, latency increases proportionally to the number of frames being buffered. Data transmissions for electronic mail (email) or facsimile messages generally can tolerate delays in receiving the data packets without sacrificing QoS. However, during real time communications, delays in receiving data packets can significantly impair the accuracy and completeness of the transmitted data. In real time opinion research systems, such delays can also substantially impair the respondent's ability to view and comprehend the opinion data.
The integrity and accuracy of online opinion research systems can also be adversely affected by data packets being lost during the transmission. Generally speaking, IP and User Datagram Protocol (UDP) environments cannot guarantee network reliability. Data packets can be lost or delayed for a variety of reasons, such as bandwidth congestion, unavailable routes, defective Internet engines, and the like. If a data packet is lost, the only way to retrieve it is to request the originator to retransmit the data packet. This, of course, would add additional delays to receiving the opinion data, thus degrading the quality of the network and providing an unsuitable medium for real time communications.
What is needed is a system and method for internetworking real time opinion research data that overcomes the above problems.
The system and method of the present invention implement a transmission scheme to control client-server interchanges within a distributed communications network, such as a real time opinion research system. Interchanges include transmitting data streams between one or more clients to a server over a computer network, including the global Internet.
A polling management unit sets and manages the transmission mode that includes event-driven and periodic interchanges. Periodic interchanges can be simultaneously or staggeredly transmitted to a sampling pool of active clients.
A transmission mode unit implements the transmission scheme set by the polling management unit. The transmission mode unit, in an embodiment, includes a parameter selector, client assignor and schedule editor. The parameter selector establishes the transmission interval and transmission period that are used to trigger each communication interchange. The client assignor creates one or more sampling classes from the sampling pool by applying a sampling quotient that is generated by the parameter selector. The schedule editor produces a transmission schedule for the active clients.
The transmission schedule can be used to interchange communications with the clients simultaneously or in a staggered manner. If more than one sampling class has been created, each sampling class would receive a separate transmission schedule for providing staggered transmissions at designated transmission intervals.
The transmission schedule can include other data preparation and formatting instructions, including data compression, aggregation and packetization.
An advantage of the present invention is the ability to increase the number of users that a server can manage during live opinion research or a data capturing event.
A feature of the present invention is that it provides a continuous stream of data to be shown and captured without loss, so that the viewer experiences a continuous stream of information associated with the event as it occurs.
The accompanying drawings, which are incorporated herein and form part of the specification, illustrate the present invention and, together with the description, further serve to explain the principles of the invention and to enable a person skilled in the pertinent art to make and use the invention. In the drawings, like reference numbers indicate identical or functionally similar elements. Additionally, the left-most digit(s) of a reference number identifies the drawing in which the reference number first appears.
The method and system of the present invention provide for the management of data interchanges over a computer network, including the global Internet or wireless networks. A transmission scheme optimizes the flow of data within an opinion research system to improve reliability and accuracy. The opinion research system is preferably, but not necessarily, of the type described in the commonly assigned '624 application.
While the above is a representative list of multimedia devices that can be used in the present invention, it should be understood that any other multimedia device, including, but not limited to, video recorders/servers, and virtual sets, could be easily included and would not change the scope of the invention. Any presently available or future developed device that is responsive to a general purpose interface is encompassed by the present invention. In addition, live feeds (such as, speeches, debates, presentations, contests, pageants, news reports, sporting events, and the like) from any type of source, including satellite, terrestrial (fiber optic, copper, coaxial, and the like), radio, microwave or any other form or method of transmission, can be provided in lieu of multimedia devices in accordance with the present invention.
A poll/media manager 142 uses media management server 134 to conduct opinion research for an event, such as, speeches, television programs, commercials, and the like. In an embodiment, media management server 134 displays a graphical user interface (GUI) on a display device (not shown). Line 154 represents a logical communication path between media management server 134 and the display GUI. Poll/media manager 142 utilizes the display GUI to program and control media management server 134.
Media management server 134 is also in communication with time base generator 138 that supports time stamping. Time base generator 138 can be a stand-alone device or implemented as a computer software application. Line 152 represents a logical communication path between media management server 134 and time base generator 138. Line 174 represents a logical communication path between time base generator 138 and multimedia devices 146. Media management server 134 utilizes time generator 138 to control the creation, synchronization and management of media streams from multimedia devices 146. The synchronized media streams are routed to a respondent, or panel of respondents, over a diverse computer network 110, which includes wired or wireless local area networks (LANs) and/or wide area networks (WANs), such as the global Internet (including the World-Wide Web (WWW)). Line 148 represents a logical communication path between media management server 134 and computer network 110. Thus, system 100 utilizes computer network 110 to communicate with respondents via one or more clients (not shown). The clients enable the respondents to interact with system 100.
System 100 also includes a load balancer 114, which receives input from all respondents. Load balancer 114 communicates with one or more polling servers 118 a-118 n. Line 170 represents a logical communication path between computer network 110 and load balancer 114. Similarly, line 168 (shown as 168 a-168 n in
Polling servers 118 a-118 n process the data stream to statistically analyze the respondents' opinions. Polling servers 118 a-118 n communicate with user demographic database 130, data checkpoint and storage database 126 and collection and display server 122. User demographic database 130 provides a centralized repository of demographic information on the respondents. Polling servers 118 a-118 n maintain a copy of a respondent's demographic records in its resident memory and uses the information to analyze the respondents' opinion data. During the analysis process, the resident memory in polling servers 118 a-118 n is periodically backed-up in data checkpoint and storage database 126.
System 100 also includes collection and display server 122, which communicates with polling servers 118 a-118 n, data checkpoint and storage database 126, user demographic database 130 and media management server 134. Collection and display server 122 receives statistical data from polling servers 118 a-118 n and aggregates the data to produce a composite result for a single event. Line 166 (shown as 166 a-166 n in
Polling servers 118 a-118 n, collection and display server 122 and media management server 134, each, represent one or more computers providing various shared resources with each other and to the other network computers. The shared resources include files for programs, web pages, databases and libraries; output devices, such as, printers, plotters and audio/video recorders and players; and communications devices, such as modems and Internet access facilities. The communications devices can support wired and wireless communications, including satellite, terrestrial (fiber optic, copper, coaxial and the like), radio, microwave and any other form or method of transmission. Each server is configured to support the standard Internet Protocol (IP) developed to govern communications over public and private Internet backbones. The protocol is defined in Internet Standard (STD) 5, Request for Comments (RFC) 791 (Internet Architecture Board). The servers can also support transport protocols, such as, Transmission Control Protocol (TCP), User Datagram Protocol (UDP) and Real Time Transport Protocol (RTP). In an embodiment, the servers use a TCP/IP protocol to provide communications between any two nodes on the network. In another embodiment, a UDP/IP protocol suite is implemented. Each server is also configured to support various operating systems, such as, Netware™ available from Novell®; MS-DOS®, Windows NT® and Windows® 3.xx/95/98/2000 available from Microsoft®; Linux® available from Linux Online Inc.; Solaris™ available from Sun Microsystems, Inc.; and the like as would be apparent to one skilled in the relevant art(s).
II. Polling Clients
As discussed above, system 100 communicates with one or more clients over computer network 110. Each client can be a personal computer, personal digital assistant (PDA), telephone, television, set-top box or like devices linked to computer network 110 and including a display device with the ability to select one or more events and indicate an opinion. The display device for the client provides a text or graphical user interface (GUI) and enables a respondent to interactively communicate with media management server 134 and load balancer 114 (or, if not included, with polling servers 118 a-118 n).
Accordingly, system 100 can be used to conduct live and on-demand polls. System 100 and the clients can be configured to support RealNetworks®, Microsoft® and Apple® media player applications, or other applications for downloading and/or streaming media as would be apparent to a person skilled in the relevant art(s). As such, event window 214 operates with a third party media management client to manage the display and respondent interaction with the event and serves as the transport platform for the delivery of frame synchronization data for real time opinion research system 100.
In an embodiment, the event is routed to the respondent from media management server 134. In another embodiment, the event can be routed to the respondent from a third party source. For example, the respondent can request to view an event from another web site, such as streaming a live newscast from a news service. In this embodiment, the third party would provide the time stamped media frames to be synchronized with polling system 100 as discussed below. The event can also be contained on a storage medium located within or connected to the client. For instance, the event can be read from a hard disk drive, removable storage drive, removable storage interface, and the like as described in more detail below.
GUI 200A also includes polling window 210 that provides a graphical representation of the respondent's current opinion.
Thus, various embodiments of the GUI for the client, including polling window 210, can easily be included with the methods and systems of the present invention. Any currently available or future developed user interface functional for collecting and sending opinion values to polling server 118 a-118 n is considered to be within the scope of the present invention. Accordingly,
Adjacent to event window 214, script window 252 receives captions or text from the polled event. Therefore, in an embodiment, a complete transcript of the polled event is synchronized with the media streams and displayed in script window 252. In an embodiment, the event is provided with captions or text from the source. In another embodiment, well-known captioning and stenographic technologies are used to produce the captions or text and synchronize the data with the media stream. The methods and systems of the present invention supports both live and delayed captioning for the events. Accordingly, in an embodiment, real time captions or text can be created and matched to the audio track as live or delayed media steams are sent to the clients. In another embodiment, pre-recorded media streams can be processed to generate the captions or text that are timed and matched to the media streams.
As discussed, the captions are displayed in script window 252. However, in an embodiment, event window 214 is configured to support embedded captioning in media streams. Therefore, in this embodiment, the captions are located in image displayed in event window 214 in lieu of, or in addition to, script window 252.
Indicator scale 248 provides an array of possible opinion values to be selected by the respondent. As discussed with reference to
As described above, polling indicator 218 provides real time indication of the respondent's current opinion regarding the event that is being viewed on event window 214. Panel value 222 (shown in
The input device can be a mouse, mouse wheel, joystick, rudder pedals, keyboard, touch screen, microphone, joystick, stylus, light pen, voice recognition unit or any other type of peripheral unit. In an embodiment, the clients are configurable to receive verbal commands to execute various tasks during the polling or post analysis sessions (e.g., interactive voice response (IVR)). Using a rule-based expert system, a processing unit enables a voice recognition unit to identify the voice of the user. The aforementioned is a representative list of input devices that can be used with the present invention, it should be understood that any other type of input device capable of measuring or monitoring the reactions or responses of an individual to the event, including, but not limited to, foot pedals, devices for measuring respiration, blinking, pulse or heart rate or other biometrics, or the like as would be apparent to one skilled in the relevant art(s) could be easily included and would not change the scope of the invention. For example, a respondent can attach a biometric device to a hand or other body part. As the respondent moves the hand through space, this movement can be translated and fed to the client to cause a corresponding movement in the polling indicator. Thus, any presently available or future developed device that is responsive to a general-purpose interface is encompassed by the present invention.
III. Media Management Server
As shown in
Polling management unit 314 exchanges signals with registering unit 310 and formatting unit 318. Referring to
Polling management unit 314 also manages the ongoing operations of system 100. Polling management unit 314 provides commands to formatting unit 318 to establish the operational modes for each polling session. For example, polling management unit 314 transmits signals to establish a synchronization scheme for the polling sessions. These instructions determine whether the clients would time stamp the opinion value data with, for example, time codes or frame codes. The time stamps are subsequently used to synchronize the opinion value with the media streams.
The synchronization instructions can also request the clients to reset the client clocks to an absolute time scheme, such as Greenwich Mean Time. Accordingly, polling management unit 314 has the capability to remotely set the client clocks to synchronize the time stamps (i.e., time codes) for all respondents.
Synchronization (in particular, resetting the client clocks) can be used to compensate for delays caused by transportation lag in the video or source signals. Transportation lag may occur when satellite relays or transmissions produce delays. Delays from encoding and decoding as well as network-initiated delays in broadcasts can be compensated on a client-by-client basis. Registering unit 310 provides the specification of the transmission source and other sources of fixed delays. Delay parameters can be set as system constants effecting all clients in a uniform manner or on a client-by-client basis.
Formatting unit 318 embeds the synchronization instructions into the data packets routed to the Java applet in the clients. Polling management unit 314 also provides instructions to formatting unit 318 to synchronize the media streams from multimedia devices 146 with the time stamps generated by time base generator 138.
A second operational mode set by polling management unit 314 is the transmission scheme. Polling management unit 314 determines the frequency for updating the composite result (shown in
Another operational mode determined by polling management unit 314 is automatic reset. If selected, polling management unit 314 would instruct formatting unit 318 to route resetting instructions to the Java applet in the clients. The Java applet would be instructed to automatically return polling indicator 218 to, for example, the “50%” mark if no response has been indicated for a designated period of time.
The Java applet can also be instructed to place the clients in a “time-out” state. If selected, after a specified period of time has elapsed since a change in opinion value (shown in
In an embodiment, GUI 200A or GUI 200B can include an icon or pull-down option (not shown) that enables the respondent to select the time-out operational mode. The time-out state can be activated after the elapse of a respondent-designated period of time or immediately upon activation. This option would enable the respondent to place the polling session in a “pause” state while the respondent engages in other activities.
While the above is a representative list of operational modes that can be used with the present invention, it should be understood that any other method for managing the operations of the polling session, including interactions with the client, as would be apparent to one skilled in the relevant art(s), can be easily included and would not change the scope of the invention.
Media management server 134 also includes formatting unit 318 that exchanges signals with one or more multimedia devices 146, time base generator 138, collection and display server 122, polling management unit 314, and media routing unit 322. As instructed by polling management unit 314, formatting unit 318 contacts and receives composite opinion data from collection and display server 122. A data packet containing the composite data is subsequently transmitted to media routing unit 322. The frequency for receiving and transmitting the composite data is determined by polling management unit 314, as discussed above.
As instructed by polling management unit 314, formatting unit 318 communicates with a plurality of multimedia devices 146 by sending media management commands to receive information from multimedia devices 146. Media management server 134, therefore, provides a means for centrally controlling each of the multimedia devices 146. For example, formatting unit 318 can instruct one or more multimedia devices 146 to send a stream of media data across network 110.
Formatting unit 318 also sends commands to time base generator 138. In response to the commands, an output data stream with synchronization data is sent to the media management server 134. In an embodiment, the synchronization data is based on an absolute time scheme, such as Greenwich Mean Time. Formatting unit 318 integrates the synchronization data with the media streams from multimedia devices 146 to create synchronized media streams. Alternatively time base generator 138 can send the synchronization data directly to multimedia devices 146 where synchronized media streams are generated and routed to formatting unit 318. Data packets containing the synchronized media streams are then transmitted to the media routing unit 322.
As discussed, formatting unit 318 utilizes a combination of technologies, such as HTML, SMIL or a combination of both accessed under an abstraction layer, to coordinate the media streams for display on the clients. By using a single time line, all media on a page can be properly time coordinated and synchronized. Accordingly, system 100 supports multimedia standards developed by Microsoft® technologies, such as, Windows®Media™ Player; RealAudio® and RealVideo® formats from RealNetworks® Inc.; or the like as would be apparent to one skilled in the relevant art(s). In an embodiment, SMIL or a created abstraction of SMIL, is used to provide compatibility with both RealNetworks® and Microsoft® technologies. Elements of media management server 134 can be adopted directly from the client multimedia technologies, such as Windows® Media™ tool offerings.
Media management server 134 also includes media routing unit 322. Media routing unit 322 receives the data packets generated and formatted by formatting unit 318. The data packets include the synchronized media stream representing the event. The data packets also include composite opinion data, including graphics, created by collection and display server 122 and formatted by formatting unit 318. Reading the network address, i.e., IP addresses, in the header frames, routing unit 322 transmits the data packets to the designated respondent over computer network 110.
As previously discussed in reference to
In response to poll/media manager 142 activating a graphical control from display GUI, media management server 134 transmits a media management command to the multimedia device 146 corresponding to the activated graphical control. In this manner, poll/media manager 142 centrally controls the operation of each of the multimedia devices 146. The display GUI also permits poll/media manager 142 to assemble the content of the events, establish the operational modes for polling management unit 314, develop formatting and configuration instructions for formatting unit 318, reconfigure or alter the records in user demographic database 130, and provide similar commands and information to control system 100 as would be apparent to one skilled in the relevant art(s).
IV. Transmission Mode Management
As described above, the transmission scheme is one of the operational modes managed by polling management unit 314. The transmission scheme controls the frequency that each client interchanges communications with system 100. Referring back to
In an embodiment of the present invention, polling management unit 314 sets and manages the transmission scheme by utilizing an application, routine or sub-routine that is referred to as a transmission mode unit. In a preferred embodiment, the transmission mode unit is located inside of polling management unit 314 as a resident component. Alternatively, the transmission mode unit can be externally coupled to, and responsive to queries from, polling management unit 314.
As shown in
A transmission period is a point in time when data is transmitted from a source (e.g., media management server 134 or a polling client). The transmission period, thus, is composed of one or more transmission intervals. For example, a transmission period could be set at four seconds, which means that the transmission period is composed of four one-second transmission intervals and, therefore, communication interchanges would occur every four seconds. In an embodiment, the transmission period is based on the quantity of clients having active sessions with media management server 134 (refereed to as “sampling pool”). For example, if fifty respondents are online, the transmission period could be set for fifty transmission intervals with each transmission interval being one millisecond. Therefore, the clients would interchange communications every fifty milliseconds. The transmission period could also be based on a multiple of the sampling pool. For example, the transmission period for fifty respondents could be 10 milliseconds (i.e., one-fifth of the active clients). In another embodiment, the transmission period is determined independently of the sampling pool. In another embodiment, the transmission period and/or transmission interval are selected by polling manager 142 (e.g., researcher or system administrator). In each embodiment, the transmission period and transmission interval can be adjusted manually or automatically to optimize the data flow and create a continuous media stream providing timely and accurate opinion results.
In an embodiment, polling management unit 314 sets the transmission scheme to interchange communications with all clients at the same time (“simultaneous transmission scheme”). Referring back to the example having a four-second transmission period, each client would report its opinion data and/or receive display updates on every fourth second. In another embodiment, polling management unit 314 instructs transmission mode unit 410 to generate a staggered transmission scheme. Referring, once again, to the previous example, the transmission period could be four seconds. However, the transmission interval could be two seconds. In this embodiment, all clients would interchange communications every four seconds, but only a fraction of the clients would interchange communications at a given time. In other words, a fraction would transmit or receive data after the first two seconds, another fraction would interchange data after the next two seconds, and so forth. Nonetheless, at every four-second time period, all clients would have interchanged communications.
Another parameter is the sampling quotient, which is used to support staggered transmissions. The sampling quotient is used to determine the subset of clients that engages in communication interchanges at each transmission interval. In a preferred embodiment, the sampling quotient is the inverse of the transmission period. However, the sampling quotient can be a multiple of the inverse of the transmission period, or it can be selected independently of the transmission period.
Client assignor 416 is a second component of transmission mode unit 410. Client assignor 416 queries or receives updates from registering unit 310 to extract the quantity and identity of clients having an active session with system 100. As discussed, parameter selector 414 determines when a client interchanges communications. Client assignor 416 determines which client interchanges communications. If a simultaneous transmission scheme is being implemented, client assignor 416 sends the addresses of all clients to schedule editor 420 to receive identical transmission periods and intervals. If a staggered transmission scheme is being implemented, client assignor 416 queries parameter selector 414 for the sampling quotient to divide the sampling pool of active clients into multiple sampling classes. Client assignor 416 would, then, assign each client to an appropriate sampling class, and forward this information to schedule editor 420.
For simultaneous transmissions, only one transmission schedule is prepared. For staggered transmissions, a separate transmission schedule is prepared for each sampling class created by class assignor 416. The transmission schedule informs each client when it should commence data transmissions and media routing unit 322 when it should broadcast updates to a particular client or class of clients. Therefore, each transmission schedule would indicate the transmission interval for beginning the transmissions and the transmission period for subsequent transmissions.
In another embodiment, multiple transmission periods can be assigned for multiple classes. In this embodiment, class assignor 416 is programmable to designate a primary class and one or more distinct secondary classes. The primary class would operate on a different transmission period than the other secondary classes. For example, the primary class can be scheduled to interchange communications every four milliseconds and the secondary classes can be schedule to interchange communications every eight milliseconds. Alternatively, each secondary class can operate on a different transmission period, e.g., eight milliseconds, sixteen milliseconds, etc. This embodiment would permit a primary class of clients (e.g., active respondents) to receive updates or transit data on a more regularly scheduled basis than other clients (e.g., non-responding observers or researchers).
As demonstrated in
The transmission schedule also includes data preparation and formatting instructions that are to be sent to the clients. In an embodiment, schedule editor 420 requests the clients to aggregate multiple data frames or payloads into a single data packet. For example, the clients could be requested to aggregate a specified quantity of frames prior to transmission, or transmit all data frames collected and aggregated within a specified time frame (e.g., transmission period). In another embodiment, schedule editor 420 generates instructions to compress frames and/or packets. Other instructions can include encryption commands to secure the client-server data path. The encryption instructions can use commonly deployed techniques, such as, Data Encryption Standard supported by the National Bureau of Standards, ANSI's Data Encryption Algorithm, public-key encryption introduced by Diffie and Hellman (D-H), the El Gamal (EG) public key system, RSA public keys developed by RSA Security Inc., DSA digital signature algorithm, and the like as would be apparent to one skilled in the relevant art(s).
In an embodiment, the transmission schedule includes synchronization instructions for the clients. As discussed above, polling management unit 314 is configurable to create synchronization instructions to reset all client clocks (or similar time-keeping mechanisms) to an absolute time standard. The transmission schedule uses synchronization to place all clients on a common time schedule during communication interchanges.
After schedule editor 420 has prepared the interchange application that contains the transmission schedule, the application is sent to formatting unit 318 which forwards the instructions to the clients or implements the transmission instructions for media management server 134, as discussed above.
V. Software and Hardware Embodiments
The present invention (e.g., system 100, media management server 134, collection and display server 122, polling servers 118 a-118 n, load balancer 114, user demographic database 130, data checkpoint and storage database 126, or any part thereof) can be implemented using hardware, software or a combination thereof and can be implemented in one or more computer systems or other processing systems. In fact, in an embodiment, the invention is directed toward one or more computer systems capable of carrying out the functionality described herein.
Computer system 500 can include a display interface 502 that forwards graphics, text, and other data from the communication infrastructure 506 (or from a frame buffer not shown) for display on the display unit 530.
Computer system 500 also includes a main memory 508, preferably random access memory (RAM), and can also include a secondary memory 510. The secondary memory 510 can include, for example, a hard disk drive 512 and/or a removable storage drive 514, representing a floppy disk drive, a magnetic tape drive, an optical disk drive, etc. The removable storage drive 514 reads from and/or writes to a removable storage unit 518 in a well-known manner. Removable storage unit 518, represents a floppy disk, magnetic tape, optical disk, etc. which is read by and written to removable storage drive 514. As will be appreciated, the removable storage unit 518 includes a computer usable storage medium having stored therein computer software and/or data.
In alternative embodiments, secondary memory 510 can include other similar means for allowing computer programs or other instructions to be loaded into computer system 500. Such means can include, for example, a removable storage unit 522 and an interface 520. Examples of such can include a program cartridge and cartridge interface (such as that found in video game devices), a removable memory chip (such as an EPROM, or PROM) and associated socket, and other removable storage units 522 and interfaces 520 which allow software and data to be transferred from the removable storage unit 522 to computer system 500.
Computer system 500 can also include a communications interface 524. Communications interface 524 allows software and data to be transferred between computer system 500 and external devices. Examples of communications interface 524 can include a modem, a network interface (such as an Ethernet card), a communications port, a PCMCIA slot and card, etc. Software and data transferred via communications interface 524 are in the form of signals 528 which can be electronic, electromagnetic, optical or other signals capable of being received by communications interface 524. These signals 528 are provided to communications interface 524 via a communications path (i.e., channel) 526. This channel 526 carries signals 528 and can be implemented using wire or cable, fiber optics, a phone line, a cellular phone link, an RF link and other communications channels.
In this document, the terms “computer program medium” and “computer usable medium” are used to generally refer to media such as removable storage drive 514, a hard disk installed in hard disk drive 512, and signals 528. These computer program products are means for providing software to computer system 500. The invention is directed to such computer program products.
Computer programs (also called computer control logic) are stored in main memory 508 and/or secondary memory 510. Computer programs can also be received via communications interface 524. Such computer programs, when executed, enable the computer system 500 to perform the features of the present invention as discussed herein. In particular, the computer programs, when executed, enable the processor 504 to perform the features of the present invention. Accordingly, such computer programs represent controllers of the computer system 500.
In an embodiment where the invention is implemented using software, the software can be stored in a computer program product and loaded into computer system 500 using removable storage drive 514, hard drive 512 or communications interface 524. The control logic (software), when executed by the processor 504, causes the processor 504 to perform the functions of the invention as described herein.
In another embodiment, the invention is implemented primarily in hardware using, for example, hardware components such as application specific integrated circuits (ASICs). Implementation of the hardware state machine so as to perform the functions described herein will be apparent to persons skilled in the relevant art(s).
In yet another embodiment, the invention is implemented using a combination of both hardware and software.
VI. Generating Transmission Schedules
At step 608, parameter selector 414 selects the appropriate transmission interval, transmission period and sampling quotient. At step 612, the sampling classes are created from the sampling quotient. If a simultaneous transmission scheme has been requested, the sampling quotient is ignored and the sampling class embodies the entire sampling pool. For staggered transmissions, the sampling quotient is used to create multiple sampling classes. Each sampling class would receive a separate transmission schedule to produce staggered communication interchanges with the clients. For example, if the sampling pool is twenty active clients and the transmission period is five seconds, the sampling quotient is 0.20 (if determined as the inverse of the transmission period). Applying the sampling quotient to the sampling pool would create a sampling rate of four clients per second. Thus, the transmission schedule would contain five sampling classes for sampling four clients every second.
At step 616, an interchange application is created to report and/or implement the transmission schedule. For staggered transmissions, each client class would receive a separate schedule that informs the clients when to report their media streams. Similarly, media routing unit 322 would also be instructed to stream opinion data updates to each client class according to the schedule. The interchanges between the clients and system 100 are structured to enable each class to transmit and receive opinion data at distinct and staggered transmission intervals. The transmission schedule would permit the clients in each class to interchange subsequent transmissions after the completion of their indicated transmission period.
For simultaneous transmissions, all clients would interchange communications at the same transmission interval, and repeat the interchanges at the next transmission period. In an embodiment, the transmission schedule includes commands to synchronize all client clocks to ensure that the clients or sampling classes report data at the properly scheduled time interval. In an embodiment, the transmission schedule includes data formatting and preparation instructions to compress, aggregate, packetize and/or encrypt the opinion data prior to transmittal.
After the interchange application has been created and sent to formatting unit 318 and media routing unit 322 for implementation, the control flow ends as indicated by step 695.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example, and not limitation. It will be apparent to persons skilled in the relevant art(s) that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the present invention should not be limited by any of the above described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
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|U.S. Classification||709/203, 370/346, 709/217, 705/12, 709/219, 725/9, 709/223, 709/218, 370/449, 725/24, 725/10, 709/224|
|Oct 26, 2000||AS||Assignment|
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